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Many excellent images can be found on Wikimedia Commons, especially in the categories listed at right. Note that many images which are available on Commons are not properly categorized yet, so it is helpful to also search directly for images there. Thousands of other useful free images can be found on the websites listed below.
{{Portal:Volcanoes/Selected picture/Layout |image=Image.jpg |size=size in pixels (if applies) |caption=rollover text |text=image description |link=link to the volcano's/volcanic feature's article }} Please make sure that the picture is relevant to volcanism and is not related to any of those already featured (for example, two pictures of Mt. Fuji).
Most hotspot volcanoes are basaltic (e.g., Hawaii, Tahiti). As a result, they are less explosive than subduction zone volcanoes, in which water is trapped under the overriding plate. Where hotspots occur in continental regions, basaltic magma rises through the continental crust, which melts to form rhyolites. These rhyolites can form violent ...
Volcanoes are usually mountains (sometimes islands, lakes, plateaus, calderas, seamounts or lava domes) that are formed when magma (liquid rock) wells up from inside the Earth. There are also analogous formations away from the Earth. Many volcanoes are categorized both as volcanoes and other landforms, such as mountains (if qualified).
Sundhnúksgígar (Icelandic pronunciation: [ˈsʏntˌn̥uksˌciːɣar̥]) or Sundhnúkagígar are volcanic craters east of Eldvörp–Svartsengi in Iceland. They are named after Sundhnúkur, which is a hill just south of Sundhnúksgígar.
The three common popular classifications of volcanoes can be subjective and some volcanoes thought to have been extinct have erupted again. To help prevent people from falsely believing they are not at risk when living on or near a volcano, countries have adopted new classifications to describe the various levels and stages of volcanic activity ...
Map of the Central American volcanic arc, with captions showing the location of several volcanoes – in the Mexico/Guatemala border: Tacaná; in Guatemala: Tajumulco, Santa Maria, Chicabal, Tolimán, Atitlán, Volcán de Fuego, Volcán de Agua, Pacaya, Chingo; in El Salvador: Apaneca Range, Chinchontepec or San Vicente, Chaparrastique or San Miguel, Chinameca and Conchagua; in Nicaragua ...
Fumaroles may occur along tiny cracks, along long fissures, or in chaotic clusters or fields. They also occur on the surface of lava flows and pyroclastic flows. [11] A fumarole field is an area of thermal springs and gas vents where shallow magma or hot igneous rocks release gases or interact with groundwater. [12]
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